Schultz, Nivaldo, et al. “Productivity and 15N Isotope Dilution of Sugarcane Inoculated With Diazotrophic Bacteria”. Pesquisa Agropecuaria Brasileira, vol. 51, no. 9, Oct. 2016, pp. 1594-01, https://doi.org/10.1590/S1678-3921.pab2016.v51.22388.